AutoCodes – Lincoln – P1158 Lincoln

P1158 Lincoln Code - Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich

Quick Answer

The Heated Oxygen Sensor 2 (HO2S2) (Downstream), after the three-way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Exhaust gas leaks, Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 2, Heated Oxygen Sensor 2 Bank 2 harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1158 Lincoln indicates Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich.
Common causes: Common causes include Exhaust gas leaks, Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 2, Heated Oxygen Sensor 2 Bank 2 harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,420

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1158 Lincoln Description

The Heated Oxygen Sensor 2 (HO2S2) (Downstream), after the three-way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air-fuel mixture (air-fuel ratio) must maintain near the ideal stoichiometric ratio. The HO2S2 output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Powertrain Control Module (PCM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S2 generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The PCM interprets Lean when the HO2S2 voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The PCM interprets Rich when the HO2S2 voltage is above 0.45 V. The P1158 code will set when the PCM detects that the HO2S2 signal is above the voltage of range for an extended period.

OBDII Code P1158 Lincoln - Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich - AutoCodes.com — P1158 Lincoln Code - Lack Of Heated Oxygen Sensor Switches Bank 2 Sensor 2 Indicates Rich

What does this mean?

What are the Possible Causes of the DTC P1158 Lincoln?

Exhaust gas leaks
Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 2
Heated Oxygen Sensor 2 Bank 2 harness is open or shorted
Heated Oxygen Sensor 2 Bank 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors

How to Fix the DTC P1158 Lincoln?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1158 Lincoln code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need more information on how to fix the P1158 Lincoln code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1158 Lincoln Code

What does OBDII code P1158 mean for a Lincoln vehicle?

P1158 indicates that the heated oxygen sensor in Bank 2 Sensor 2 is not switching properly and is detecting a consistently rich air-fuel mixture.

What are the symptoms of code P1158 in a Lincoln?

Common symptoms include reduced fuel efficiency, rough idling, poor engine performance, and possibly an illuminated check engine light.

What causes the P1158 code to appear on a Lincoln?

Potential causes include a faulty oxygen sensor, exhaust leaks near the sensor, issues with the fuel injectors, or a malfunctioning catalytic converter.

Can a bad oxygen sensor cause the P1158 code?

Yes, a failing or damaged heated oxygen sensor is one of the most common causes of this code.

How can I diagnose the P1158 code on my Lincoln?

Start by inspecting the Bank 2 Sensor 2 oxygen sensor for damage, test its functionality, check for exhaust leaks, and scan for any other related codes.

What tools are needed to fix code P1158?

You may need an OBDII scanner, a multimeter for testing the sensor, basic hand tools, and possibly a replacement oxygen sensor.

Is it safe to drive with the P1158 code on a Lincoln?

While it may be safe to drive short distances, ignoring the code can lead to long-term issues like poor fuel economy or damage to the catalytic converter.

How do I fix the P1158 code on a Lincoln?

Repairs can include replacing the faulty oxygen sensor, checking for exhaust leaks, cleaning or replacing clogged fuel injectors, or addressing issues with the catalytic converter.

Will clearing the P1158 code solve the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be repaired to prevent the code from returning.

How much does it cost to fix the P1158 code on a Lincoln?

Repair costs can vary depending on the specific issue but typically range from $100 to $400 for parts and labor, with oxygen sensor replacement being the most common fix.